As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE TREND DATA SHOWS EGT INDICATION TO HAVE GREATER THAN EXPECTED SCATTER. INDICATION ERRORS ARE STILL SUSPECT. GROUNDED - YES. REMOVED AND REPLACED CJ10 CORE ENG HARNESS PER TECH SERVICE REQUEST USING B737-800 AMM 73-21-06-000-803-F00. OPS TEST PASSED PER AMM 73-21-06-400-803-F00.